question_answer

From the top of a 60 m high tower, the angle of depression of the top and bottom of a building are observed to be\[\text{3}0{}^\circ \]and\[\text{6}0{}^\circ \] respectively. Find the height of the building.

A) \[60\sqrt{3}\,m\]            

B)        \[40\sqrt{3}\,m\]

C) 40 m                     

D)        20 m